Heritability of cortisol response to confinement stress in European sea bass dicentrarchus labrax

Volckaert, Filip; Hellemans, Bart; Batargias, Costas; Louro, Bruno; Massault, C.; Houdt, J. K. J. Van; Haley, Chris; Koning, Dirk-Jan de; Canário, Adelino V.M.

doi:10.1186/1297-9686-44-15

Cited by 28 publications

(32 citation statements)

References 31 publications

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“…The heritability of cortisol response to confinement stress was 0.33 ± 0.09, in the usual range (0.18-0.56) for the same trait in salmonids (Fevolden et al, 2002(Fevolden et al, , 1999Pottinger and Carrick, 1999;Weber et al, 2008), but well higher than the previous estimate available in sea bass (0.08 ± 0.06, Volckaert et al, 2012). It has to be noted that the estimate of Volckaert et al…”

Section: Discussionmentioning

confidence: 59%

“…Large genetic variation for growth exists in this species, and a considerable response of growth rate to selection (in the range of 20-40% per generation) has been demonstrated (20-40% per generation; Dupont-Nivet et al, 2008;Vandeputte et al, 2009). Few data exist showing limited genetic variation in cortisol stress response, with an heritability estimate of 0.08±0.06 (Volckaert et al, 2012) and three suggestive QTLs (Massault et al, 2010). No heritability estimates exist for the swimming ability of this species.…”

Section: Accepted Manuscriptmentioning

confidence: 91%

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Quantitative genetic variation for post-stress cortisol and swimming performance in growth-selected and control populations of European sea bass (Dicentrarchus labrax)

et al. 2016

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Sea bass is a major species in Mediterranean aquaculture, and is now being subject to selective breeding programs for faster growth. In terrestrial species, it was demonstrated that fast growth may be linked to a correlated degradation of fitness traits. In this experiment, we evaluated 600 young sea bass from a factorial mating of 76 sires and 13 dams. The sires were from four genetic groups, wild (W), domesticated (D), and selected for growth (2 groups, M and P). The 600 offspring were submitted to two acute confinement stress challenges at 6 weeks intervals, and plasma cortisol at one hour post stress was measured. The same fish were also submitted to two swimming challenges at a 5 days interval, where the maximum sustained swimming speed (Umax) of each fish was evaluated. Parentage was assessed by genotyping of 12 microsatellites. 554 fish had both valid parentage and phenotypes. Cortisol had a low repeatability (r = 0.30 between the two successive measurements) while repeatability was moderate for Umax (r = 0.62). However, genetic correlations between successive measurements were very high (> 0.96) for both traits, indicating that successive measurements were related to the same trait. Heritability was moderate for mean post-stress cortisol (h2 = 0.34 ± 0.09) and Umax (h2 = 0.48 ± 0.08). When Umax was expressed in m.s− 1, it was negatively correlated to cortisol (rA = − 0.48 ± 0.08) and weakly correlated to body weight (rA = 0.12 ± 0.16), but figures changed when it was expressed in Body Lengths.s− 1(h2 = 0.55 ± 0.08, rA = − 0.10 ± 0.19 with cortisol and rA = − 0.64 ± 0.07 with body weight, respectively). Cortisol was moderately negatively correlated with body weight (rA = − 0.36 ± 0.18). The four lines did not differ for cortisol or Umax, but when Umax was expressed in BL.s− 1 it tended to be lower in the two selected lines -which were also significantly larger. However, this is likely due to a phenotypic decrease of relative Umax with increasing body size. We conclude that selection for growth and/or domestication should not impact maximum sustained swimming speed in the European sea bass, but may tend to favour animals with low cortisol responsiveness. These traits could be used to orientate functional capabilities other than productivity in sea bass. Highlights► we estimate genetic parameters for stress response and (for the first time) swimming ability in sea bass ► we find no correlated response to selection for fast growth ► this can help design and monitor domestication and selective breeding programs in aquaculture

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Section: Discussionmentioning

confidence: 59%

Section: Accepted Manuscriptmentioning

confidence: 91%

Quantitative genetic variation for post-stress cortisol and swimming performance in growth-selected and control populations of European sea bass (Dicentrarchus labrax)

et al. 2016

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“…Genetics of fish personality traits and coping style is still in its infancy, but some studies have shown Quantitative Trait Loci (QTL, in zebrafish, Danio rerio [34]) or genetic variance or heritability of boldness [30, 35]. Heritability of stress response, particularly post-stress plasmatic cortisol has been mainly studied in salmonids [36–42] and recently in European seabass, Dicentrarchus labrax [43, 44]. Divergent strains on post-stress plasmatic cortisol level have been developed in rainbow trout [41, 42].…”

Section: Introductionmentioning

confidence: 99%

Heritability of Boldness and Hypoxia Avoidance in European Seabass, Dicentrarchus labrax

et al. 2016

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To understand the genetic basis of coping style in European seabass, fish from a full factorial mating (10 females x 50 males) were reared in common garden and individually tagged. Individuals coping style was characterized through behavior tests at four different ages, categorizing fish into proactive or reactive: a hypoxia avoidance test (at 255 days post hatching, dph) and 3 risk-taking tests (at 276, 286 and 304 dph). We observed significant heritability of the coping style, higher for the average of risk-taking scores (h2 = 0.45 ± 0.14) than for the hypoxia avoidance test (h2 = 0.19 ± 0.10). The genetic correlations between the three risk-taking scores were very high (rA = 0.96–0.99) showing that although their repeatability was moderately high (rP = 0.64–0.72), successive risk-taking tests evaluated the same genetic variation. A mild genetic correlation between the results of the hypoxia avoidance test and the average of risk-taking scores (0.45 ± 0.27) suggested that hypoxia avoidance and risk-taking tests do not address exactly the same behavioral and physiological responses. Genetic correlations between weight and risk taking traits showed negative values whatever the test used in our population i.e. reactive individual weights were larger. The results of this quantitative genetic analysis suggest a potential for the development of selection programs based on coping styles that could increase seabass welfare without altering growth performances. Overall, it also contributes to a better understanding of the origin and the significance of individual behavioral differences.

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“…Specifically, IL and AL largemouth bass were placed into adjacent containers and simultaneously exposed to experimental temperatures. Because AL fish were exposed to an Illinois winter before use in experimentation, elevated cortisol levels may have been a response to a long-term thermal stressor; high cortisol could also be due to interpopulation variation in response to laboratory confinement (e.g., Volckaert et al 2012). Many physiological parameters of largemouth bass, including cortisol, return to prestress levels within a few hours of recovery (Suski et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Physiological Disturbances and Overwinter Mortality of Largemouth Bass from Different Latitudes

VanLandeghem¹,

Wagner²,

Wahl³

et al. 2013

Physiological and Biochemical Zoology

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Thermal conditions associated with winter can influence the distribution of a species. Because winter severity varies along latitudes, populations of temperate fish located along a latitudinal gradient may display variation in both sublethal and lethal responses to cold stressors. Sublethal physiological disturbances were quantified in age 1 largemouth bass (Micropterus salmoides) from populations originating from Alabama and Illinois but raised in a common environment. Fish were exposed to 6 h of rapid cold shock from 20° to 8°C (controls were held at 20°C) and then sampled for white muscle, whole blood, and plasma. After cold shock, glucose concentrations were elevated in Alabama but not Illinois fish. Sodium was lower and chloride was higher in Alabama largemouth bass, but fish from Illinois had a greater propensity for potassium loss during cold shock. In Illinois ponds, Alabama largemouth bass exhibited lower overwinter survival (adult: 10%; age 0: 22%) than did those from Illinois (adult: 80%; age 0: 82%). Latitudinal variation in physiological responses to cold stressors may therefore influence overwinter survival of largemouth bass and the ability of a fish species to exist over large geographic areas.

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Heritability of cortisol response to confinement stress in European sea bass dicentrarchus labrax

Cited by 28 publications

References 31 publications

Quantitative genetic variation for post-stress cortisol and swimming performance in growth-selected and control populations of European sea bass (Dicentrarchus labrax)

Quantitative genetic variation for post-stress cortisol and swimming performance in growth-selected and control populations of European sea bass (Dicentrarchus labrax)

Heritability of Boldness and Hypoxia Avoidance in European Seabass, Dicentrarchus labrax

Physiological Disturbances and Overwinter Mortality of Largemouth Bass from Different Latitudes

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